Loans & Leases (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	$ 1,391,759,000	$ 1,249,463,000
Less: Unearned Income	3,523,000	2,561,000
Total Loans & Leases	1,388,236,000	1,246,902,000
Less: Allowance for Credit Losses	34,274,000	34,217,000
Loans & Leases, Net	1,353,962,000	1,212,685,000
Collateral on borrowings lines with FHLB	456,500,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	411,037,000	353,109,000
Total Loans & Leases	407,514,000	350,548,000
Agricultural Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	328,264,000	311,992,000
Total Loans & Leases	328,264,000	311,992,000
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	41,092,000	32,680,000
Total Loans & Leases	41,092,000	32,680,000
Residential 1st Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	151,292,000	140,257,000
Total Loans & Leases	151,292,000	140,257,000
Home Equity Lines and Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	35,477,000	42,042,000
Total Loans & Leases	35,477,000	42,042,000
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	256,414,000	221,032,000
Total Loans & Leases	256,414,000	221,032,000
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	150,398,000	143,293,000
Total Loans & Leases	150,398,000	143,293,000
Consumer & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	5,052,000	5,058,000
Total Loans & Leases	5,052,000	5,058,000
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Loans & Leases	0	0
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Gross Loans & Leases	12,733,000	0
Total Loans & Leases	12,733,000	0
Federal Home Loan Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collateral on borrowings lines with FHLB	456,500,000
Maximum Borrowing Capacity	346,400,000
Federal Reserve Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collateral on borrowings lines with FHLB	496,500,000
Maximum Borrowing Capacity	$ 369,400,000